package com.lagou.handler;

import com.alibaba.fastjson.JSON;
import com.lagou.context.RpcProviderApplicationContext;
import com.lagou.pojo.RpcRequest;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import org.springframework.beans.factory.annotation.Autowired;

import java.lang.reflect.Method;

/**
 * 自定义的业务处理器
 */
public class UserServiceHandler extends ChannelInboundHandlerAdapter {

    //当客户端读取数据时,该方法会被调用
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {

        //注意:  客户端将来发送请求的时候会传递一个参数:  UserService#sayHello#are you ok
         //1.判断当前的请求是否符合规则
        System.out.println("读msg:" + msg.toString());
        RpcRequest request = JSON.parseObject(msg.toString(), RpcRequest.class);
        String className = request.getClassName();
        Object instance = RpcProviderApplicationContext.getApplicationContext().getBean(className);
        String methodName = request.getMethodName();
        Object params = request.getParams();
        Method method = instance.getClass().getMethod(methodName,params.getClass());
        Object invoke = method.invoke(instance, params);

        ctx.writeAndFlush(invoke);


//        if(msg.toString().startsWith("UserService")){
//            //2.如果符合规则,调用实现类货到一个result
//            UserServiceImpl service = new UserServiceImpl();
//            String result = service.sayHello(msg.toString().substring(msg.toString().lastIndexOf("#")+1));
//            //3.把调用实现类的方法获得的结果写到客户端
//            ctx.writeAndFlush(result);
//        }


    }
}
